The Bouquet is an item obtained in Hometown. When leaving Asgore's flower shop, Asgore gives it to Kris as a gift for Toriel. It is implied he wants it to look like a gift from Kris, since it seems that Toriel and Asgore are on bad speaking terms.
When later speaking to Toriel, an option titled "Flowers" can be used to give them to her. After re-entering the house, the trashcan's floral scent increases, implying that Toriel threw away the bouquet.
- Many flowers are seen filling trash cans in Alphys's alley. She can be talked to about them, and explains that Asgore frequently gives her bouquets and inquires about Kris in school.
- He always asks how you're doing in school... Then gives me a bouquet of them. - Alphys